Furnace grate



(No Model.)

W. H. PAGE. FURNAGE GRATE.

No. 433,419. Patented July 29, 1890.V

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Ilhllr lllllllll" HIIIIIHIIHI mi" UNITED STATES PATENT OFFICE.

lVILLIAM H. PAGE, OF NOPVICH, CONNECTICUT, ASSIGNOR TO THE WVM. H. PAGE 700D TYPE CO., OF SAME PLACE.

FU RNACE-GRATE.

SPECIFICATION forming part of Letters Patent No. 433,419, dated July 29, 1890.

Application filed January l0, 1890. Serial No. 336,549.` (No model.)

To all whom it may con/cern:

Be it known that I, WILLIAM H. PAGE, a citizen of the United States, residing at Norwich, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Furnace-Crates; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in grates for furnaces or boilers, which will be hereinafter fully described and claimed.

The present invention relates more especially to improvements in that class of grates known as rocking-bar grates,77 in which a series of grate-bars are arranged and geared to turn or rock in their bearings to agitate the contents of the furnace, boiler, stove, &c., an example of which is shown in the patents to S. Smyth, No. 212,407, dated February 18, 1879, and No. 199,752, dated January 29, 1878. The common practice of securing` a grate of this character in a furnace or other heater is by means of straps, which are bolted to the furnace or heater and to the frame in which said bars are journaled; but this method is objectionable, because it. is a very difficult and tedious operation to remove the straps and the grate when it is desired to renew the latter or any7 of the individual bars of the grate.

The object of my invention is to provide for ready and easy access to the grate, and to enable any one or the whole series of gratebars to be readily removed from the furnace.

NVith this end in view my invention consists of a supporting-bar, which is mounted so as to drop below the normal level or position of the grate when the frame of the ash* pit door or other part of the furnace or heater front is removed, and in providing a separate bearing or journal on said frame for eachv of 45 the individual grate-bars to enable each bar to be readily lifted out of said supporting-bar for the purpose of replacing either grate-bar with another grate-bar.

To enable others to more readily under- 5o stand and practice my invention, I will now proceed to a detailed description thereof, in

connection with theaccompanying drawings, in which- Figure 1 is a plan view of a `grate embodying my invention, showing the shell of the furnace and the frame of the ash-pit door in section. Fig. 2 is a section on the line a: 0c of Fig. 1. Fig. 3 is a section at right angles to Fig. 2 on the line y y of Fig. 1. Fig. 4 is an end elevation of the grate, lookin g at the front 6o thereof and showing a part of the shell of the furnace in section. Fig. 5 is a vertical longitudinal sectional view corresponding to Fig. 2, showing the supporting-bar lowered or dropped and the grate-bars resting thereon, said supporting-bar being limited in its downward movement by suitable stops arranged in its path.

Like numerals of reference denote corresponding parts in all the figures of the draw- 7o ings, referring to which- 1 designates the series of rocking bars of -the grate, which, as shown in Figs. 3 and 4,

may be made triangular in cross-section or of any other desired con guration. rlhe grate-barsl are supported at their front ends by a common siipporting-bar 3, and at their front ends they have independent bearingse on the rear wall of the ash-pit or the frame of the aslrpit. The supporting-bar 3 of the 8o grate-bars is arranged substantially at right angles to the line of the grate-bars near or at the front ends of said grate-bars, and said bar 3 is arranged at. the front side of the furnace in juxtapositionu to the frame 5 of the 85 ash-pit door. The independent separate bearings a for the rear ends of the grate-bars are each' cast or made integral with the frame or the Wall of the ash-pit, and the bearings 4. are provided with sockets 6, which receive en- 9o larged heads 7 on the rear ends of the gratebars. These socket-s operate to prevent the grate-bar from being withdrawn from the bearings when the grate-bars are pulled end Wise by dropping said grate-bars below their normal level; but the upper sides of the sockets in the bearings are left open, so that each individual grate-bar can be readily lifted out of the socket by hand, but at the same time the head of the grate-bar cannot be accidentx :o ally disengaged from the bearing thereof.

rlhe common supporting-bar 3 is provided in its upper edge with recesses 8, which constitute the bearings for the grate-bars and from which said grate-bars can be readily lifted and removed, and the gratc-bars are also provided at their front ends with trunnions 9, which arefitted in the bearings or journals 8 of the bar 3 of the supportingframe, the rear ends of the grate-bars being headed and supported in the independent bearings 4, heretofore described. As is usual in this class of grates, the bars are geared together in sets of two or more, in order to enable each set to be rocked or turned simultaneously, and I provide the frontends of the grate-bars l with gear-wheels or pinions 10, said pinions being arranged within the bar 3, which bar is thus located between the pinions on the grate-bars and the frame 5 of the ash-pit door.

To enable ready access to be had to the grate, in order to facilitate the removal of the whole or any one of the series of gratebars, I have mounted or arranged the supportingbar 3 for the grate in a novel manner, which will permit said grate or a part thereof to drop below the normal `level of the grate when a part of the furnacee-as, for instanctgvihe ash-pit door-frame or the front plate indicated at 5 in Figs. l and .Q3-is removed. lVith this end in view I provide the front bar 3 with bearings, in which said bar can rock or drop when the ash-pit door-frame 5 is re moved. This supporting-bar 3 at the front of the grate is provided with depending or bell-crank arms l2, which terminate in trunnions 13, that are arranged a short distance at one side ofor below the plane of said bar 3, and these angular arms and trunnions are journaled in bearings 14, which lie below the normal position ofthe grate and the supporting-bar 3.

The common supporting-bai' 3 of the series of grate-bars is arranged in close juxtaposition to the frame of the ash-pit door, (see Fig. 1,) and this frame serves to sustain said bar 3 in an upright position, and the grate is thus steadily supported in position. To enable ready access to the grate to repair the latter or remove the grate bar or bars should they become injured or broken, and replace said bar or bars, the ash-pit door-frame is removed, (which can be readily accomplished, as all furnaces are constructed with the removable door-frame,) which thus permits the pivoted supportingbar 3 to turn and drop down below its normal position, and thus lower the front end of the grate, the downward movement of the pivoted supporting-barbeinglimited by suitable fixed stops or obstructions arranged in the path of said bar, as indicated at 3 in Fig. 5.

In practice the front end of the grate can be allowed to drop two or three inches, more or less, as may be required, and as the gratebars merely rest in the bearings and sockets of the bar 3 and of the independent bearings G, said bars can be readily and easily lifted out of the furnace or heater.

The operation and advantages of my invention will be readily understood and appreciated from the foregoing description, taken in connection with the drawings.

I am aware that my improvement can be applied to other kinds of grates than the one shown and described herein, and that changes in the form and proportion of parts and details of construction of the mechanism herein shown and described as an embodiment of my invention can be made without 'departing from the spirit or sacrificing the advantages of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a grate, substantially as described, the combination, with a series of grate-bars, of a supporting-bar common to the series of gratebars and arranged below and transversely across said grate-bars, said su pporting-bar being adapted to drop or fall below thelevel of the grate and be sustained in its normal elevated position by a part of the furnace or heater, as and for the purpose described.

2. In a grate,vsubstantially as described, the combination of a pivoted supporting-bar adapted to drop or fall below the normal level of the grate, and a series of grate-bars independently journaled in said supporting-bar, which bar is arranged below and across the grate-bars, as and for the purpose described.

In a grate, the combination, with a series of grate-bars, of a common supporting dropbar arranged transversely across the series of grate-bars and in which one end of each gratebar is journaled, and the independent bearings for the opposite ends of said grate-bars, substantially as described.

Ll. In a grate, substantially as described, the combination of a common drop-bar arranged at the front of the furnace, a series of bearings or sockets at the rear of the furnace, and a series of grate-bars, each of which is loosely'itted in one of the sockets or bearings and is independently journaled in the d rop-bar, whereby each grate-bar is removable from the drop-bar and its bearing, as and for the purpose described.

5. In a grate, the combination of the independent iixed bearings, a pivoted drop-bar, and a series of grate-bars journaled in the drop-bar and fitted in the bearings to be capable of a limited vertical play, but held against endwise movement thereby when the dropbar is lowered, for the purpose described, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

VILLIAM H. PAGE.

Witnesses:

LUcIUs BROWN, DONALD G. PERKINS.

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